[Rd] Ordering of values returned by unique

[Witold Eryk Wolski]

Hi,

If you go to the frame on www.r-project.org -> documentation -> publication
and search for "blue book" "green book" you will find that this refers to
two books :
/"The New S Language"
//"Programming with Data"
respectively
/
Mass refers to "/Modern Applied Statistics with S"/
/E

Earl F. Glynn wrote:

>"Tony Plate" <tplate at blackmesacapital.com> wrote in message
>news:6.1.0.6.2.20040929094231.05e42a00 at mailhost.blackmesacapital.com...
>  
>
>>I depend on this all the time, so I also checked some references.  In the
>>Blue book the documentation for the functions unique and duplicated is
>>combined and implies the above.  In MASS 4th Ed, the page referred to by
>>the index entry for 'unique' (p48, #9 in my copy) states that 'unique'
>>removes duplicates as identified by 'duplicated', which implies that the
>>order of retained elements is not changed.  The Green book has no index
>>entry for 'unique'.  In S-plus the implementation of unique.default(x)
>>    
>>
>uses
>  
>
>>x[!duplicated(x)].
>>    
>>
>
>So what is the "Blue book", the "Green book", and MASS 4th Ed?
>
>efg
>
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>
>  
>


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Dipl. bio-chem. Witold Eryk Wolski         
MPI-Moleculare Genetic
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